package me.huangxiang.concurrent;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class MultiThreadEchoServer {
    private static ExecutorService tp = Executors.newCachedThreadPool(); // 这种线程池可以重复利用已经创建的线程并加快线程的执行

    static class HandleMsg implements Runnable{

        Socket clientSocket;

        public HandleMsg(Socket clientSocket) {
            this.clientSocket = clientSocket;
        }

        @Override
        public void run() {
            BufferedReader is = null;
            PrintWriter os = null;

            try {
                is = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
                os = new PrintWriter(clientSocket.getOutputStream(), true);
                String inputLine = null;
                long b = System.currentTimeMillis();

                while ((inputLine = is.readLine()) != null){
                    os.println(inputLine);
                }
                long e = System.currentTimeMillis();
                System.out.println("spend: " + (e - b) + "ms");
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                if (is != null){
                    try {
                        is.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (os != null){
                    os.close();
                }
                try {
                    clientSocket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public static void main(String[] args) {
        ServerSocket echoServer = null;
        Socket clientSocket = null;

        try {
            echoServer = new ServerSocket(8000);
        } catch (IOException e) {
            e.printStackTrace();
        }

        while(true){
            try {
                clientSocket = echoServer.accept();
                System.out.println(clientSocket.getRemoteSocketAddress() + "connect!");
                tp.execute(new HandleMsg(clientSocket));
            }catch (IOException e){
                System.out.println(e);
            }
        }
    }
}
